On an interview I was given a task to implement a simple messaging system, using timers, message-driven beans and a build tool of my choice. This, of course, had toContinue reading
The TimeZone (as well as the locale and encoding) are retrieved by the JVM from the operating system. This in my opinion is not a good decision, but that’s notContinue reading
Eric Evans has formulated what domain-driven design (DDD) is. Martin Fowler is a great supporter and advocate of DDD. These are remarkable names and it is almost certain they areContinue reading
If a developer has used the Java security APIs he already knows what’s ahead. That’s not the only example, alas, but I’ll be using it to illustrate my point. TheseContinue reading
Imagine the case where you have a JSF application that’s already using some custom ELResolver, but you want to get all the benefits of spring and want to have theContinue reading
It seems that some/many developers haven’t developed (pun intended) a good set of techniques to identify and resolve problems. And problems always occur, even in simple programs. Recently I’ve beenContinue reading
I couldn’t find a definitive answer to this in the docs, and although there seems to be a logical answer, one can’t be sure. The scenario is this – youContinue reading
It is often argued whether tests that need a database should be called “unit tests”. Most often the answer is “No, these are database integration tests”. My opinion is –Continue reading
JAXB: [javax.xml.bind.UnmarshalException: unexpected element (uri:”http://mynamespace/”, local:”entity”). Expected elements are ({}entity)] The following exception broadly means that an element encountered during unmarshallization isn’t found in the JAXB Context. The details, howeverContinue reading